ABSTRACT
All qualitative spectroscopic analysis depends in one way or another on comparing spectra of the specimens to be identified with spectra of “knowns” or “standards.” In the course of development of the various spectroscopic methods used for chemical analysis, many methods of making such comparisons have been devised. A small subset of these methods has been applied to near-infrared (NIR) analysis. The methods have been chosen by the various NIR practitioners to match the characteristics of the NIR spectra to which they are applied.
